{
  "manageEntity": {
    "action": "Save",
    "entityId": "1546549879",
    "entityType": "Track",
    "nonce": "0x0a2a96fc4f434b4ce4b0858969207478ba58dfb864c70b2122acec5069e90345",
    "signature": "0xd27bf4ca88d5f6577d273d472b8736bc549e6432274814fafeb48c38f702193e5a666bbf9ac69a91ecbb2ad48fc7e21342affe6b214775f0e54a4bcd01fce0041b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}